<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品列表</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
            <!-- 步骤条区域 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab栏 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
            <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeLeave" @tab-click="tabClick">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                        <el-cascader
                        v-model="addForm.goods_cat"
                        :options="cateList"
                        :props="cascaderProps"
                        @change="handleChange">
                        </el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <el-form-item :label="item.attr_name" v-for="item in goodsParams" :key="item.attr_id">
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                  <el-form-item :label="item.attr_name" v-for="item in onlyData" :key="item.attr_id">
                    <el-input v-model="item.attr_vals"></el-input>
                  </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                  <el-upload
                    :action="uploadURL"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :headers="headerObj"
                    :on-success="handleSuccess">
                    <el-button size="small" type="primary">点击上传</el-button>
                  </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                  <quill-editor v-model="addForm.goods_introduce">
                  </quill-editor>
                  <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览 -->
        <el-dialog
          title="图片预览"
          :visible.sync="previewVisible"
          width="30%">
          <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_cat: [],
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_introduce: '',
        pics: [],
        attrs: []

      },
      //   表单规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
          { min: 1, message: '不能为0', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
          { min: 1, message: '不能为0', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
          { min: 1, message: '不能为0', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ]
      },
      //   级联选择器配置
      cascaderProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'

      },
      //   获取到的商品分类列表
      cateList: [],
      //   获取到的商品参数
      goodsParams: [],
      // 获取到的静态属性
      onlyData: [],
      // 上传图片的url地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片路径
      previewPath: '',
      previewVisible: false

    }
  },
  computed: {
    //   被选中的分类id
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取分类数据失败')
      this.cateList = res.data
      // console.log(res.data)
    },
    // 级联选择器变化触发事件
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // tab标签切换触发事件
    beforeLeave (newTab, oldTab) {
      console.log(newTab, oldTab)
      if (oldTab === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类!')
        return false
      }
    },
    // tab标签切换
    async tabClick () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) return this.$message.error('获取商品参数失败')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.goodsParams = res.data
        console.log(this.goodsParams)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) return this.$message.error('获取静态属性失败')
        this.onlyData = res.data
        console.log(this.onlyData)
      }
    },
    // 处理移除图片的操作
    handleRemove (file) {
      // console.log(file)
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(index => {
        return index.pic === filePath
      })
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm.pics)
    },
    // 图片上传成功返回路径
    handleSuccess (response) {
      const picInfo = {
        pic:
      response.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm.pics)
    },
    // 图片预览
    handlePreview (file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 添加商品
    async addGoods () {
      this.$refs.addFormRef.validate(valid => {
        if (!valid) return this.$message.error('请填写必要的表单项')
      })
      // 深拷贝addForm对象
      const form = _.cloneDeep(this.addForm)
      form.goods_cat = form.goods_cat.join(',')
      // 处理动态参数
      this.goodsParams.forEach(item => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_vals: item.attr_vals.join(' ')
        }
        this.addForm.attrs.push(newInfo)
      })
      // 处理静态属性
      this.onlyData.forEach(item => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_vals: item.attr_vals
        }
        this.addForm.attrs.push(newInfo)
      })
      form.attrs = this.addForm.attrs
      console.log(form)
      // 发起添加商品请求
      const { data: res } = await this.$http.post('goods', form)
      if (res.meta.status !== 201) return this.$message.error('添加商品失败')
      this.$message.success('添加商品成功')
      this.$router.push('/goods')
    }
  },
  created () {
    this.getCateList()
  }
}
</script>
<style lang="less" scoped>
.el-steps {
    margin: 15px 0;
}
.el-step__title{
    font-size: 13px;
}
.el-checkbox{
  margin: 0 10px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>
